JP2002304185A - Method and system for copyright management, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a system for copyright management and a program, which eliminate the need for a person to go through the trouble of discriminating similarities of literary works and easily obtain data for literary work identification from a digital literary work itself, without having to use special watermarks or the like, and easily record it in the digital literary work itself. SOLUTION: Numeric data for literary work identification are extracted from a signal of digital contents 1 using the function of a data extraction processing part 112. This numeric data are converted to a color code by the function of a color code conversion processing part 113. This color code is recorded in a prescribed position of an image frame of the digital contents 1 by the function of a color code insertion processing part 114, and thus digital contents 2 subjected to copyright protection processing are generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copyright management system, a copyright management method, and a program for protecting the copyright of a digital work, and more particularly, to identifying a copyrighted digital work from the digital work itself. The present invention relates to a copyright management system, a copyright management method, and a program for extracting data and inserting the extracted data into an image frame of a digital work to protect its identification data.

[0002]

2. Description of the Related Art In recent years, there has been an increasing awareness of copyrights, and the number of opportunities for copyright owners to investigate whether their copyrights have been infringed has increased. In this copyright infringement investigation, for example, digital work (digital content) broadcast on digital television, etc.
To determine whether it infringes copyright, humans have determined the similarity by recording broadcast digital content and playing it back. Another method is to insert a digital watermark (watermark) in the original digital work in advance, record the digital contents broadcasted digitally, and check whether the digital watermark is recorded. , To determine if it violated copyright.

[0003]

[Problems to be solved by the invention]

As described above, in order to protect the copyright of a digital work, a digital content suspected of copyright infringement is recorded, and a person judges the similarity while playing back the content. , Such as inserting a watermark in the digital work to be protected in advance, storing and using the used watermark, playing back the content that is allegedly infringing copyright, and collating the watermark. Was needed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and does not require a person to judge the similarity of a copyrighted work, and does not use a special watermark or the like.
To provide a copyright management system, a copyright management method, and a program which can easily obtain data for identifying a copyrighted work from the digital work itself and can easily record the data in the digital work itself. With the goal.

[0006]

According to the present invention, the above objects are achieved by the means as set forth in the appended claims.

That is, the copyright management system of the present invention extracts a data for identifying a copyrighted work from a digital music work and manages the copyright using the data for identifying the copyrighted work. Means for measuring the presence or absence of a plurality of predetermined frequency components at predetermined time intervals for a performance signal from the start of performance of the digital music work to a predetermined time; and Means for obtaining numerical data corresponding to the presence or absence of each of the predetermined time intervals, and means for using the numerical data obtained for each of the predetermined time intervals as numerical data for identifying a copyrighted work. .

Further, the copyright management system of the present invention extracts data for identifying a work from a digital music work,
In a copyright management system for managing copyrights using the copyrighted work identification data, a performance signal from the start of performance of the digital music work to a predetermined time is determined at predetermined time intervals. Means for measuring the magnitude of the plurality of frequency components, means for determining the presence or absence of the frequency component by determining whether the magnitude of the measured frequency component is equal to or greater than a predetermined value, and Means for obtaining corresponding bit data at predetermined time intervals;
Means for obtaining, from the bit data, numerical data corresponding to the bit data at predetermined time intervals; and means for using the numerical data obtained at each predetermined time interval as data for identifying a copyrighted work. And

Further, the copyright management system of the present invention extracts data for identifying a copyrighted work from a digital video work,
In a copyright management system for managing copyrights using the data for identifying a copyrighted work, a coordinate position is determined in advance for each of a plurality of continuous frames of digital images of the digital video work. Means for determining the presence or absence of the R signal of a plurality of pixels; means for determining numerical data corresponding to the presence or absence of the R signal of each pixel for each frame;
Means for using the numerical data obtained for each frame as data for identifying a copyrighted work.

Further, the copyright management system of the present invention extracts copyrighted work identification data from a digital video work,
In a copyright management system for managing copyrights using the data for identifying a copyrighted work, a coordinate position is determined in advance for each of a plurality of continuous frames of digital images of the digital video work. Means for extracting the R signals of a plurality of pixels; means for determining the presence or absence of the R signal of the pixel by determining whether the R signal of the pixel is equal to or greater than a predetermined value; Means for extracting corresponding bit data for each frame, means for obtaining corresponding numerical data from the bit data extracted for each frame, and the numerical data obtained for each frame as data for copyrighted work identification. And means for use.

Further, the copyright management system according to the present invention is characterized in that the R signal is a B signal or a G signal.

The copyright management system according to the present invention further comprises: means for converting each of the plurality of numerical data obtained as the data for identifying the copyrighted work into a color code according to a predetermined conversion rule; Means for inserting each of the pixels having the color code into a predetermined pixel position of each continuous frame from the start of scanning of the image of the digital video work.

Further, the copyright management system of the present invention extracts a predetermined number of numerical data from a digital work according to a predetermined extraction rule, converts each of the numerical data into a color code according to a predetermined conversion rule, and In a copyright management system that manages copyright by inserting each of the pixels to which a color code has been added into a specific position of each of a predetermined number of consecutive frames from the start of scanning of an image, a digital copyright target to be investigated for copyright infringement. For each frame of a predetermined number of consecutive frames from the start of scanning of the image of the object, the color code of the pixel at the specific position is extracted, and the color code is subjected to a conversion reverse to the predetermined conversion rule to obtain numerical data. A predetermined number of numerical data for identifying a copyrighted work according to the predetermined extraction rule from a frame of an image of the digital work to be investigated for the copyright infringement. Means for calculating, and means for comparing numerical data obtained by inversely converting the color code of the pixel at the specific position with numerical data for identifying a copyrighted work obtained by a predetermined extraction rule from an image frame of a digital work. It is characterized by having.

A copyright management method according to the present invention is directed to a copyright management method for extracting copyright identification data from a digital music copyrighted work and managing the copyright using the copyright identification data. Measuring the magnitude of a plurality of predetermined frequency components at predetermined time intervals for a performance signal from the start of performance of the digital music work to a predetermined time; A procedure for determining the presence or absence of the frequency component by whether or not is a predetermined value or more, a procedure for obtaining bit data corresponding to the presence or absence of the plurality of frequency components at predetermined time intervals, and from the bit data, A step of obtaining corresponding numerical data at predetermined time intervals; and a step of using the numerical data obtained at the predetermined time intervals as data for identifying a copyrighted work. And it features.

The copyright management method according to the present invention is a copyright management method for extracting copyright identification data from a digital video copyrighted work and managing the copyright using the copyright identification data. , For each of a plurality of consecutive frames of digital images of the digital video work,
Extracting R signals of a plurality of pixels whose coordinate positions are determined in advance, determining whether the R signals of the pixels are present or not based on whether the R signals of the pixels are equal to or greater than a predetermined value, A step of extracting bit data corresponding to the presence or absence of the R signal of the pixel for each frame, a step of obtaining numerical data corresponding to the bit data extracted for each frame, and a step of extracting the numerical data obtained for each frame. And a procedure for use as data for identifying a copyrighted work.

The copyright management method according to the present invention is characterized in that the R signal is a B signal or a G signal.

Further, the computer program of the present invention is used in a copyright management system for extracting data for identifying a copyrighted work from a digital music copyrighted work and managing the copyright using the data for identifying the copyrighted work. Computer
A procedure for measuring the magnitude of a plurality of predetermined frequency components at predetermined time intervals for a performance signal from the start of performance of the digital music work to a predetermined time; A procedure for determining the presence or absence of the frequency component by determining whether or not the frequency component is greater than or equal to a predetermined value; a procedure for determining bit data corresponding to the presence or absence of the plurality of frequency components at predetermined time intervals; A step of obtaining numerical data to be performed at predetermined time intervals, and a step of using the numerical data obtained at the predetermined time intervals as data for identifying a copyrighted work.

Further, the computer program of the present invention is used in a copyright management system that extracts data for identifying a copyrighted work from a digital video copyrighted work and manages the copyright using the data for identifying the copyrighted work. Computer
Extracting, for each frame of a plurality of continuous frames of the digital image of the digital video work, R signals of a plurality of pixels whose coordinate positions are determined in advance; A procedure for determining the presence or absence of the R signal of the pixel based on whether or not the above, a procedure for extracting bit data corresponding to the presence or absence of the R signal of each pixel for each frame, and a procedure for extracting bit data corresponding to the frame for each pixel And a step of using the numerical data obtained for each frame as data for identifying a copyrighted work.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an example of the configuration of a copyright management system according to the present invention. Numeral 1 denotes digital contents such as music and video before copyright protection processing, numeral 2 denotes digital contents after copyright protection processing, 11 is a copyright management system, 10
1 is a control unit for controlling the entire copyright management system, 10
Reference numeral 2 denotes a database; 103, an input / output unit for inputting / outputting a digital content reproduction signal or recording signal; 111, a processing program unit; 112, a data extraction processing unit; 113, a color code conversion processing unit; Is shown.

In FIG. 1, a reproduction signal of the digital content 1 before the copyright protection processing is taken into the copyright management system 11 from the input / output unit 103. Processing program unit 1
The eleventh data extraction processing unit 112 calculates
Numerical data (a plurality of pieces) for identifying a copyrighted work are extracted by a method described later. The color code conversion processing unit 113 converts the numerical data for copyrighted work identification into a color code by a method described later. The color code insertion processing unit 114 inserts pixels having each color code one by one into specific positions of a plurality of consecutive frames of an image by a method described later (one per frame). The digital content in which the pixel having the color code for copyrighted work is inserted into the frame is output from the input / output unit 103 to become the copyright protected digital content 2 and is shipped to the market. The copyright-protected digital content 2 is recorded in the database 102 and used for copyright management.

[Extraction of Numerical Data in the Case of Musical Digital Work] First, a method of obtaining numerical data for identifying a digital music work will be described.

FIG. 2 is a diagram for explaining an example of obtaining numerical data for identifying a work from a digital music work. In FIG. 2, the horizontal axis represents the time axis, and the vertical axis represents the frequency. The frequency components included in the performance signal of the music work are represented along the time axis. The sample time is 1/256 second. Hereinafter, a method for extracting numerical data for identifying a copyrighted work will be described with reference to FIG.

(1) First, a signal from digital content 1 (in this case, music content) is set to be input to the copyright management system 11. Then, the point at which the first sound comes out of silence is set as the sampling start point.

(2) The measurement is performed for 15 seconds, and a point one second after the start of the measurement is set as a first measurement point. Thereafter, measurement is performed every second for 15 seconds to obtain a total of 15 measurement data.

(3) At the first measurement point (one second after the start), the measurement points 1-1 to 1- 1 shown in FIG.
The four points 4 are set as measurement target points. Measurement point 1-1 is "1,000 Hz", and measurement point 1-2 is "3,000 H".
z ", measurement point 1-3 is" 6,000 Hz ", measurement point 1-
Reference numeral 4 denotes a point of “9,000 Hz”, and a determination of “data present“ 1 ”” or “data absent“ 0 ”” is made at each measurement point.

(4) The determination of "1" with data or "0" without data at each of the measurement points "1-1" to "1-4" is performed as follows. For example, measurement point 1
Taking -1 as an example, as shown in FIG. 3 showing an example of sampling points of frequency components, the frequency "F (1,0
00 Hz) ”,“ F + ΔF (measurement point a) ”,
Five points of “F + Δ2F (measurement point b)”, “F−ΔF (measurement point c)”, and “F−2ΔF (measurement point d)” are set as measurement target frequencies. For example, if ΔF = 5 Hz, then F =
"990Hz", "995Hz", "1,000H
“z”, “1,005 Hz Hz”, and “1,010 Hz” are the frequencies to be measured.

(5) Each frequency measurement point "1-
For “1”, “a”, “b”, “c”, and “d”, “1” is set when the magnitude of the frequency component is larger than a predetermined value (threshold), and “0” is set when it is smaller. ". Then, according to the majority decision method, when there are three or more “1”, the measurement point 1-1 is “1” with data, and when there are two or less, it is “0” without data. Measurement point "1-2"
The presence / absence of data is also measured in the same manner for .about. "1-4".

(6) Thus, 4-bit data is obtained from the measurement points "1-1", "1-2", "1-3", and "1-4" at the first measurement time (0000-1111). (Binary number)). In addition, the measurement point “2-
Also, 4-bit data is obtained from “1”, “2-2”, “2-3”, and “2-4” in a similar manner. By performing this measurement for 15 seconds, 15 pieces of 4-bit data are obtained.

(7) The 4-bit data is replaced with numerical data as follows. First, numerical values 256 corresponding to 256 colors are divided into 17 sections. That is, 1 section = 256
/ 17 = about 15. Then, when the 4-bit data is "0"
000 "is 15 and" 0001 "is 30
In the following, a numerical value up to 240 in the case of “1111” is assigned. “0000” → “15” “0001” → “30” “0010” → “45” “0011” → “60” · · · · · “1111” → “240”

(8) This numerical conversion is performed on 15 pieces of 4-bit data to obtain 15 pieces of numerical data. This one
Five pieces of numerical data become numerical data for work identification.
A method of embedding this numerical value in an image frame will be described later.

In the above example, four frequency components are to be measured, and four bits, that is, 16 types of numerical data can be obtained. However, four frequency components are to be measured. The present invention is not limited to this. For example, it is possible to use eight bits, that is, eight bits, that is, 256 kinds of numerical data.

[Extraction of Numerical Data in the Case of Digital Video Work] Next, a method of obtaining numerical data for identifying a copyrighted work in a digital video work will be described.

FIG. 4 is a diagram for explaining an example of obtaining numerical data for identifying a work from a digital video work, and is an example of a digital image in which 30 frames are scanned per second. In FIG. 4, F1 to F15 are 1 /
The first 15 frames “1-1” to “1-4” scanned on the screen every 30 seconds are pixels serving as data sample points in the first frame F1, and “2-1” to “2”.
"-2" indicates a pixel serving as a data sample point in the second frame F2. The coordinate positions of these data sample points on the frame are predetermined fixed points, and are common to each frame. That is, four time points fixed from the scan start time every 1/30 second. The frames from which data is sampled are 15 frames from the first frame F1 to the F15th frame F15.
, And a sample value of 15-digit image data is obtained.

Although data is not sampled from the remaining 15 frames constituting one second in this example, data can be sampled from the remaining frames if necessary.

Hereinafter, a method for extracting numerical data from a frame will be described.

(1) In FIG. 4, the first frame F1
The image data is sampled at the pixel 1-1 serving as the data sampling point of the image data. In this case, as shown in FIG. 5 showing an example of the sample points of the image data, a pixel 1-1 serving as a data sample point and a total of five pixels a, b, c and d adjacent thereto. Pixel is set as a measurement target point.

(2) In this case, R (red data: 0 to 256) is 12 in each of the five pixels to be measured.
If the number is 7 or more, “1” with data is set. If the number is 126 or less, “0” is set without data. 1-1 is “data present“ 1 ””. Also, 2
In the case where the number is less than or equal to the number, the image data sample point 1-1 is set to “no data“ 0 ””. For pixels “1-2” to “1-4”, the presence or absence of data is checked by the same method.

(3) Thus, pixel 1 on frame F1
4-bit data is obtained from -1, pixel 1-2, pixel 1-3, and pixel 1-4 (0000-1111). Further, fifteen 4-bit data are obtained from fifteen frames from frame F1 to frame F15.

(4) The 4-bit data is replaced with numerical data as follows. First, numerical values 256 corresponding to 256 colors are divided into 17 sections. That is, 1 section = 256
/ 17 = about 15. Then, when the 4-bit data is "0"
000 "is 15 and" 0001 "is 30
Hereafter, 16 types of numerical values are allocated up to 240 in the case of “1111”. “0000” → “15” “0001” → “30” “0010” → “45” “0011” → “60” · · · · · “1111” → “240”

(5) This numerical conversion is performed on 15 pieces of 4-bit data to obtain 15 pieces of numerical data. This one
Five pieces of numerical data become numerical data for work identification.
A method of converting the numerical data into a color code and embedding the numerical data into an image frame will be described later.

In the above example, there are four pixels on the frame to be measured and four bits, that is, 16 types of numerical data, can be obtained. However, four pixels are to be measured. However, the number is not limited to eight, and may be eight bits, that is, 256 kinds of numerical data.

In the example described above, one second is 30 seconds.
In the example described above, the frame is composed of frames.
It is needless to say that the present invention can be applied to a case where it is composed of 0 frames.

[Embedding of data in frame]
A method of converting the obtained numerical data into a color code and a method of embedding a pixel having the color code in a frame will be described.

(1) Thirty frames scanned in one second are a unit for recording one work identification code. The position where the pixel having the color code corresponding to the numerical data is inserted is the first pixel of each frame.

(2) When replacing each numerical data of 15 digits with a color code of 256 colors, one of the following 12 types of data is used for each numerical value "d". (R, G, B) = (d, 0, 0) (R, G, B) = (d, 0, 255) (R, G, B) = (d, 255, 0) (R, G, B B) = (d, 255, 255) (R, G, B) = (0, d, 0) (R, G, B) = (0, d, 255) (R, G, B) = (255) , D, 0) (R, G, B) = (255, d, 255) (R, G, B) = (0, 0, d) (R, G, B) = (0, 255, d) (R, G, B) = (255, 0, d) (R, G, B) = (255, 255, d)

(3) For each numerical value "d", which of the above-mentioned 12 types of color codes should be selected is determined by the adjacent 3
In order to make the color similar to the pixel (right, lower, diagonally lower right pixel), the respective color components of the three pixels of right, lower, diagonally lower right are additively averaged, respectively, to obtain an average value Rm (red) of R (red), An average Gm of G (green) and an average Bm of B (blue) are determined.

(4) Then, of the above 12 kinds of color codes, (R,
G, B).

| R−Rm | + | G−Gm | + | G−Gm |

(5) The color code (R, G, B) obtained for each of the fifteen numerical values is given to the first pixel of each frame. FIG. 6 is a diagram for explaining an example of inserting a color code into a frame, and is an example of a digital image that scans 30 frames per second. In FIG. 6, 1
15th frame P1 from first frame P1 of second
Using the first pixel positions of the frames up to 5, the pixels having the obtained color code are sequentially embedded. The pixel embedding start time is synchronized with the screen scanning start time.

(6) The color code of the pixel inserted as described above remains as it is even if the content is digitally edited or broadcast, and is used as copyright protection confirmation data (data for identifying a copyrighted work). Can be used.

In the example described above, each of the fifteen numerical data is one of 16 types of numerical data, and thus the discriminable number is theoretically 16 to the 15th power. This is enough numbers to uniquely identify the work. In addition, since the number of measured frequency components in a digital music work and the number of measured pixels in a frame in a digital video work can be arbitrarily selected, each numerical data is not limited to 16 types and can be further increased. it can.

Further, as shown in FIG. 7 showing an example of the data structure for the work identification of the digital music work, the data for work identification is a 9-digit signal, and the start signal is “red R: FF ( 255) / G: 00 / B: 00 ”in two digits,
As the end signal, “blue R00 / G: 0 / B: F
If F (255) "is set to two digits and 20 colors can be selected as the color code, the number of identifiable works is 20 to the fifth power (3.2 million), and the music information (record association 70 Number), which is enough to deal with

[Second Embodiment] FIG. 8 is a diagram showing an example of a system configuration according to a second embodiment of the present invention. A system for examining the content of digital television broadcast for copyright infringement is described. This is an example of the configuration.
In FIG. 8, reference numeral 104 denotes a receiving unit for receiving digital television broadcasts; 115, a color code / numerical data conversion processing unit;
16 is a numerical data comparison processing unit, 201 is a monitor (monitoring)
Broadcasting station that broadcasts the target digital content, 30
Reference numeral 1 denotes a viewer who watches a digital broadcast, and other reference numerals are the same as those in FIG.

(1) In FIG. 8, in the copyright management system 11, digital content broadcast from the broadcast station 201 is received by the receiving unit 104 and monitored.

(2) The color code of the first pixel of the frame is extracted from the broadcast digital content by the processing of the color code / numerical data conversion processing unit 115.
The extracted color code is converted into numerical data. This conversion procedure is performed by executing the procedure for converting the numerical data described above into color codes in reverse order. This scanning is performed for 15 frames from the start of scanning, and 15 numerical data are obtained.

(3) From the image of the digital content being monitored, the data extraction processing unit 112 performs the processing described above with reference to FIG. 4 (the method of extracting numerical data for identifying a copyrighted work from image data). Extract numerical data. By this method, 15 numerical data are obtained.

(4) Then, the numerical data comparison processing section 1
By the processing in step 16, the numerical data converted from the color code is compared with the numerical data extracted by the method described with reference to FIG. If the two numerical data match, this digital content is copyright-protected digital content, and it can be known who owns the copyright. Thus, it is possible to determine whether or not the content has been broadcast with a legitimate right.

In the example described above, one second is 30 seconds.
In the example described above, the frame is composed of frames.
It is needless to say that the present invention can be applied to a case where it is composed of 0 frames.

The embodiment of the copyright management system according to the present invention has been described above. However, the present invention is not limited to the illustrated example, and various modifications may be made without departing from the gist of the present invention. Of course, it can be added.

[0061]

According to the copyright management system and the copyright management method of the present invention, a predetermined number of performance signals from a start of performance of a digital music work to a predetermined time are provided at predetermined time intervals. The presence / absence of a frequency component is measured, and numerical data according to the presence / absence of the frequency component is used as data for identifying a copyrighted work, so that data for copyrighted work identification can be easily obtained from a digital music copyrighted work itself. At the same time, the copyright can be reliably protected by the numerical data.

Further, according to the copyright management system and the copyright management method of the present invention, for each of a plurality of continuous frames of an image of a digital video work, a plurality of pixels having predetermined coordinate positions are determined. Since the R signal is measured and the numerical data according to the presence or absence of the R signal is used as the data for identifying the copyrighted work, the data for the copyrighted work can be easily obtained from the video copyrighted work itself. The copyright can be reliably protected by the data.

Further, according to the copyright management system and the copyright management method of the present invention, for each of a plurality of continuous frames of images of a digital video work, a plurality of pixels whose coordinate positions are determined in advance. The G or B signal is measured, and the numerical data according to the presence or absence of the G or B signal is used as the data for identifying the copyrighted work. And the copyright can be reliably protected by this data.

Further, according to the copyright management system and the copyright management method of the present invention, a plurality of numerical data obtained as data for identifying a copyrighted work are respectively associated with predetermined color codes, and these color codes are stored. Pixels are inserted at predetermined positions in a continuous frame of an image of a digital video work, so that data for work identification can be easily recorded in the digital video work, and the copyright is reliably protected. can do. Also, since the numerical data for identifying the copyrighted work can be obtained from the content itself by reproducing the digital video copyrighted work, there is no particular need to store it.

Further, according to the copyright management system and the copyright management method of the present invention, a numerical value extracted from a color code of a pixel recorded at a specific position of an image frame of a digital work to be investigated for copyright infringement. The data is compared with numerical data obtained from the presence or absence of an R signal (or a G signal or a B signal) in a pixel (plurality) at a predetermined position of an image frame of a digital work to be investigated for copyright infringement. Therefore, it is possible to easily check whether or not the digital work infringes the copyright. Also, since the numerical data for identifying the copyrighted work is obtained by reproducing the digital video copyrighted work, it is not particularly necessary to store it. In addition, without human intervention,
It can be done automatically.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a copyright management system of the present invention.

FIG. 2 is a diagram for explaining an example of obtaining numerical data for work identification from a digital music work.

FIG. 3 is a diagram illustrating an example of sampling points of frequency components.

FIG. 4 is a diagram for describing an example of obtaining numerical data for work identification from a digital video work.

FIG. 5 is a diagram illustrating an example of sample points of image data.

FIG. 6 is a diagram for describing an example of inserting a color code into a frame.

FIG. 7 is a diagram showing an example of a data structure for identifying a digital music work.

FIG. 8 is a diagram illustrating an example of a system configuration according to a second embodiment of this invention.

[Explanation of symbols]

 Reference Signs List 1 digital content before copyright protection processing 2 digital content after copyright protection processing 11 copyright management system 101 control unit 102 database 103 input / output unit 104 reception unit 111 processing program unit 112 data extraction processing unit 113 color code conversion processing unit 114 Color code insertion processing unit 115 Color code / numerical data conversion processing unit 116 Numerical data comparison processing unit 201 Broadcasting station 301 Viewer F1-F15 frame P1-P15 frame

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 7/08 G10L 9/00 N 7/081 F term (reference) 5B057 CA01 CA08 CA12 CA16 CB01 CB08 CB12 CB16 CC01 CE08 5C053 FA13 GB06 GB11 JA01 JA21 KA01 KA24 5C063 AB03 AB05 CA23 DA05 DA07 5C076 AA14 BA06

Claims (12)

[Claims] 1. A copyright management system for extracting data for identifying a copyrighted work from a digital music copyrighted work and managing the copyright using the data for identifying the copyrighted work, wherein the performance of the digital music copyrighted work is started. Means for measuring the presence or absence of a plurality of predetermined frequency components at predetermined time intervals with respect to a performance signal from to a predetermined time; from the measurement result, numerical data corresponding to the presence or absence of a plurality of frequency components A copyright management system comprising: means for obtaining at each time interval; and means for using the numerical data obtained at each predetermined time interval as numerical data for identifying a copyrighted work. 2. A copyright management system for extracting data for identifying a copyrighted work from a digital music copyrighted work and managing the copyright using the data for identifying the copyrighted work, wherein the performance of the digital music copyrighted work is started. Means for measuring the magnitude of a plurality of predetermined frequency components at predetermined time intervals with respect to the performance signal from to a predetermined time, and whether or not the magnitude of the measured frequency component is equal to or more than a predetermined value Means for determining the presence or absence of the frequency component, means for determining bit data corresponding to the presence or absence of the plurality of frequency components at predetermined time intervals, A copyright management system comprising: means for determining each time, and means for using the numerical data obtained at each of the predetermined time intervals as data for identifying a copyrighted work. System. 3. A copyright management system for extracting data for identifying a copyrighted work from a digital video copyrighted work and managing copyrights using the data for identifying the copyrighted work, wherein the digital image Means for determining the presence / absence of R signals of a plurality of pixels whose coordinate positions are determined in advance for each frame of a plurality of continuous frames, and numerical data corresponding to the presence / absence of an R signal of each pixel A copyright management system comprising: means for obtaining the numerical value for each frame; and means for using the numerical data obtained for each frame as data for identifying a copyrighted work. 4. A copyright management system for extracting data for identifying a copyrighted work from a digital video copyrighted work and managing copyrights using the data for identifying the copyrighted work, wherein a digital image of the digital video copyrighted work is provided. Means for extracting R signals of a plurality of pixels whose coordinate positions have been determined in advance for each of a plurality of consecutive frames of the plurality of frames, and determining whether the R signals of the pixels are equal to or greater than a predetermined value. Means for determining the presence / absence of an R signal, means for extracting bit data corresponding to the presence / absence of an R signal of each pixel for each frame, and numerical data corresponding to the bit data extracted for each frame from the bit data extracted for each frame. A copyright management system, comprising: means for obtaining a value; and means for using the numerical data obtained for each frame as data for identifying a copyrighted work. 5. The copyright management system according to claim 3, wherein the R signal is a B signal or a G signal. 6. A means for converting each of the plurality of numerical data obtained as the data for identifying the copyrighted work into a color code according to a predetermined conversion rule; 6. The copyright management device according to claim 1, further comprising: a unit for inserting a digital video work at a predetermined pixel position in each continuous frame from the start of scanning of the image of the digital video work. system. 7. A predetermined number of numerical data is extracted from a digital work according to a predetermined extraction rule, each of the numerical data is converted into a color code according to a predetermined conversion rule, and each of the pixels to which the color code is assigned is converted. In a copyright management system that manages copyright by inserting it into a specific position of a predetermined number of frames that are continuous from the start of scanning of an image, a digital work subject to copyright infringement investigation is continuously scanned from the start of scanning. Means for extracting a color code of the pixel at the specific position for each frame of the predetermined number of frames, performing a conversion reverse to the predetermined conversion rule on the color code to obtain numerical data, Means for obtaining a predetermined number of numerical data for identifying a copyrighted work from the frame of the image of the digital work to be investigated according to the predetermined extraction rule; Means for comparing numerical data obtained by inversely converting the original color code with numerical data for identifying a copyrighted work obtained from an image frame of a digital work by a predetermined extraction rule. Copyright management system. 8. A copyright management method for extracting work identification data from a digital music work and managing the copyright using the work identification data, wherein the digital music work starts playing. A procedure for measuring the magnitude of a plurality of predetermined frequency components at predetermined time intervals for the performance signal from to a predetermined time; and determining whether the magnitude of the measured frequency component is equal to or greater than a predetermined value. A step of determining the presence or absence of the frequency component, a step of obtaining bit data corresponding to the presence or absence of the plurality of frequency components at predetermined time intervals, and, from the bit data, numerical data corresponding to the predetermined time intervals A copyright management method comprising: a step of obtaining numerical values for each time; and a step of using numerical data obtained for each of the predetermined time intervals as data for identifying a copyrighted work. 9. A copyright management method for extracting copyrighted work identification data from a digital video work and managing copyrights using the work identification data, wherein the digital image of the digital video work is Extracting the R signals of a plurality of pixels whose coordinate positions are determined in advance for each of a plurality of consecutive frames, and determining whether the R signals at the pixels are equal to or greater than a predetermined value. Determining the presence or absence of the R signal, extracting bit data according to the presence or absence of the R signal of each pixel for each frame, and extracting the corresponding numerical data from the bit data extracted for each frame. A copyright management method comprising: a step of obtaining; and a step of using the numerical data obtained for each frame as data for identifying a copyrighted work. 10. The copyright management method according to claim 9, wherein said R signal is a B signal or a G signal. 11. A computer for use in a copyright management system for extracting copyrighted work identification data from a digital music work and managing copyrights using the copyrighted work identification data, A procedure for measuring the magnitude of a plurality of predetermined frequency components at predetermined time intervals for a performance signal from the start of performance of a work to a predetermined time, and the magnitude of the measured frequency component is a predetermined value. A procedure for determining the presence or absence of the frequency component based on whether or not the above, a procedure for obtaining bit data corresponding to the presence or absence of the plurality of frequency components at predetermined time intervals, and numerical data corresponding to the bit data from the bit data And a procedure of using the numerical data obtained at each of the predetermined time intervals as data for identifying a copyrighted work. Of the program. 12. A computer used in a copyright management system for extracting copyrighted work identification data from a digital video work and managing copyrights using the copyrighted work identification data. Extracting, for each of a plurality of continuous frames of the digital image of the copyrighted work, R signals of a plurality of pixels whose coordinate positions are determined in advance; and wherein the R signals of the pixels are equal to or more than a predetermined value. Determining whether or not the pixel has an R signal, extracting bit data corresponding to the presence or absence of the R signal of each pixel for each frame, and extracting the bit data for each frame from the bit data extracted for each frame. A program for executing a procedure for obtaining corresponding numerical data and a procedure for using the numerical data obtained for each frame as data for identifying a copyrighted work.